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User's Guide
SLOU308–January 2011
TPA6139A2 EVM
This section provides an overview of the Texas Instruments (TI) TPA6139A2 DirectPath™ stereo
headphone amplifier evaluation module (EVM). It includes a brief description of the module and a list of
EVM specifications.
Contents
1 Description ................................................................................................................... 2
2 EVM Specifications ........................................................................
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Description www.ti.com Figure 2. TPA6139A2 EVM Bottom View 1 Description The TPA6139A2 is a DirectPath™ stereo headphone amplifier capable of driving 2 Vrms into a 600 Ω load and deliver up to 25 mW/Ch into 32 Ω with a 3.3V supply. The TPA6139A2 is designed using TI’s patented DirectPath™ technology and requires no output DC blocking capacitors. The TPA6139A2 EVM is a complete, stand-alone audio board. It contains the TPA6139A2 TSSOP (PW) DirectPath™ stereo headphone amplifier. All components ar
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www.ti.com Reference 3.1.2.2 Shutdown Controls 1. Shutdown is controlled by pushbutton S1. Press and hold S1 to place the TPA6139A2 in shutdown. Release S1 to reactivate the TPA6139A2. 3.1.3 Gain Setting The gain setting is programmed with the GAIN pin and is latched when the MUTE pin is set high. The default gain of the TPA6139A2EVM is set to 3.5dB using a 49.9 kΩ resistor (R2). The gain resistor can be adjusted to achieve a gain range from 0 dB to 20 dB. Refer to the datasheet for more details
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Reference www.ti.com 4.1 TPA6139A2EVM Schematic Figure 3. TPA6139A2EVM Schematic 4 TPA6139A2 EVM SLOU308–January 2011 Submit Documentation Feedback © 2011, Texas Instruments Incorporated
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www.ti.com Reference 4.2 TPA6139A2EVM PCB Layers spacer spacer Figure 4. Top Silkscreen spacer spacer Figure 5. Bottom Silkscreen 5 SLOU308–January 2011 TPA6139A2 EVM Submit Documentation Feedback © 2011, Texas Instruments Incorporated
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TPA6139A2EVM Bill of Materials www.ti.com 5 TPA6139A2EVM Bill of Materials Table 2. TPA6139A2EVM Bill of Materials SMD Qty. Reference Description Manufacturer Part Number Size 1 U1 Headphone AMP with 2 Vrms output TSSOP14-PW ROHS 0603 TPA6139A2PW 1 LED1 LED, GREEN 2.0V SMD0805 ROHS 0805 LUMEX OPTO SML-LXT0805GW-TR 2 TVS1, TVS2 TRANSIENT VOLTAGE SUPPRESSION SMA 100V 400W 0603 LITTLEFUSE SMAJ100A ROHS 2 C7, C9 CAP SMD0603 CERM 33PFD 50V 5% NPO ROHS 0603 MURATA GRM1885C1H330JA01D 1 C8 CAP SMD0603 C
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Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the t
